212736693869 has 12 divisors (see below), whose sum is σ = 247477397724. Its totient is φ = 182339708544.

The previous prime is 212736693863. The next prime is 212736693887. The reversal of 212736693869 is 968396637212.

It can be written as a sum of positive squares in 2 ways, for example, as 130005676969 + 82731016900 = 360563^2 + 287630^2 .

It is not a de Polignac number, because 212736693869 - 2⁸ = 212736693613 is a prime.

It is a super-2 number, since 2×212736693869² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212736693863) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2072219 + ... + 2172455.

It is an arithmetic number, because the mean of its divisors is an integer number (20623116477).

Almost surely, 2^212736693869 is an apocalyptic number.

It is an amenable number.

212736693869 is a deficient number, since it is larger than the sum of its proper divisors (34740703855).

212736693869 is a wasteful number, since it uses less digits than its factorization.

212736693869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143564 (or 143557 counting only the distinct ones).

The product of its digits is 35271936, while the sum is 62.

The spelling of 212736693869 in words is "two hundred twelve billion, seven hundred thirty-six million, six hundred ninety-three thousand, eight hundred sixty-nine".